CN101829687A - Method for controlling roll gap of strip steel finishing mill to eliminate influence of specification change - Google Patents
Method for controlling roll gap of strip steel finishing mill to eliminate influence of specification change Download PDFInfo
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- CN101829687A CN101829687A CN200910010677A CN200910010677A CN101829687A CN 101829687 A CN101829687 A CN 101829687A CN 200910010677 A CN200910010677 A CN 200910010677A CN 200910010677 A CN200910010677 A CN 200910010677A CN 101829687 A CN101829687 A CN 101829687A
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Abstract
The invention relates to a method for controlling the roll gap of a strip steel finishing mill to eliminate the influence of specification change. In the method, the influence caused by specification-changing rolling is eliminated by adding a roll gap compensation value determined according to the specification into a finishing mill roll gap calculation formula so as to improve the head thickness control precision during specification-changing rolling. The roll gap compensation value determined according to the specification is added into the original finishing mill roll gap calculation formula, and the precompensation is performed on the lcsi deviation value during specification-changing rolling, so the calculation precision of the finishing mill roll gap is effectively improved during specification-changing rolling and the aim of improving the thickness precision of the finished product strips is fulfilled. Due to the control method, the thickness control precision is improved under the condition of unreasonable span during the production of hot rolled sheets and strips; the large-span free rolling can be realized to a certain degree; and the flexibility of on-site production is improved.
Description
Technical field
The present invention relates to the control method of band aluminium mill roll-gap in a kind of hot continuous rolling production.
Background technology
In the production process of hot rolled plate band, the control of finishing mill roll gap is mainly calculated by process computer and is finished.Temperature value, each frame roll-force of finish rolling, each frame roll gap of finish rolling to finish rolling inlet temperature value, each frame of finish rolling calculates successively, and send result of calculation to the one-level computer, by one-level computer control PLC, depress motor and hydraulic means adjustment roll gap by the PLC adjustment.Torrid zone thickness and precision can be divided into band steel toe portion's thickness hit rate and band steel total length thickness deviation.Band steel total length thickness deviation makes the difference of each dot thickness of total length and lock value or setting value less than allowed band by AGC according to head thickness (AGC adopts the head locking relatively) or according to the thickness of setting (absolute AGC), the head thickness precision has a significant effect to AGC, head thickness directly determines the thickness and precision of logical plate, therefore, the thickness and precision that improve logical plate must improve the head thickness precision.The head thickness precision is decided by the setting accuracy of thickness setting model to the finishing mill roll gap.In actual production, because the complexity of produced on-site condition, cause the reasonability that can't guarantee spans such as steel grade, specification in the operation of rolling, the unreasonable computational accuracy that influences thickness model of span, thus influence the head thickness precision of band and lead to the plate thickness precision.
Summary of the invention
The band aluminium mill roll-gap control method that the purpose of this invention is to provide a kind of eliminate influence of specification change, the roll gap offset that this method is determined by specification by increase in finish rolling roll gap computing formula is eliminated and is changed the rolling influence of specification, overcome the unreasonable influence of span in the operation of rolling, improved thickness control accuracy the head thickness and precision.
For achieving the above object, the present invention is achieved through the following technical solutions:
The band aluminium mill roll-gap control method of eliminate influence of specification change, the roll gap offset that this method is determined by specification by increase in finish rolling roll gap computing formula is eliminated and is changed the rolling influence of specification, improve and to change the head thickness control accuracy of specification when rolling, the computation model formula of finish rolling roll gap is:
In the formula: the gap-finishing mill calculates roll gap
Fdh-finishing mill exit thickness
The f-finishing mill calculates roll-force
f
0-finishing mill acyclic homologically trioial roll-force
M-finishing mill mill stiffness
Lcs-roll gap learning coefficient, under the identical rolling condition, the specification difference, there is deviation in this value, and the specification span is big more, and deviate is big more, influences the head thickness precision.
α-roll gap offset determines this value according to specification
I-represents the finishing mill shelf number, scope 1～n (n represents the finishing stand number, and each bar is produced different, is generally 5～7)
Roll gap offset α among the present invention, relevant with steel grade, thickness, width, promptly (in the model, not determine that according to steel grade, thickness, width band steel place layer is other) relevant with the layer at band steel place, therefore with this variable storage in the other file of finish rolling layer.Definite method of α value is in actual production process, by actual rolling result data under a large amount of normal rolling conditions is carried out statistical analysis, selects the lcs of conventional variety
iThe mean value of value is as a reference value, with other lcs of other layer
iIt is poor that mean value and this a reference value are done, and obtains the lcs of each frame
iThe deviate of value, the mean value of getting this deviate is as other α value of each layer, thus, eliminates the lcs of each layer between other
iDeviate.
The present invention is owing to increased the roll gap offset that is provided with by specification, the lcs that exists when the exchange specification is rolling in former finishing mill roll gap computing formula
iDeviate carried out in advance compensation, effectively raise and change specification when rolling, the computational accuracy of finishing mill roll gap, and then reach the purpose of the thickness and precision that improves the finished product band.By adopting this control method, in the production process of hot rolled plate band, improved the thickness control accuracy under the unreasonable situation of span, can realize the large span free rolling to a certain extent, improved the flexibility of produced on-site.
The specific embodiment
The band aluminium mill roll-gap control method of eliminate influence of specification change, the roll gap offset that this method is determined by specification by increase in finish rolling roll gap computing formula is eliminated and is changed the rolling influence of specification, improve and to change the head thickness control accuracy of specification when rolling, the computation model formula of finish rolling roll gap is:
In the formula: the gap-finishing mill calculates roll gap
Fdh-finishing mill exit thickness
The f-finishing mill calculates roll-force
f
0-finishing mill acyclic homologically trioial roll-force
M-finishing mill mill stiffness
Lcs-roll gap learning coefficient, under the identical rolling condition, the specification difference, there is deviation in this value, and the specification span is big more, and deviate is big more, influences the head thickness precision.
α-roll gap offset determines this value according to specification
I-represents the finishing mill shelf number, scope 1～n (n represents the finishing stand number, and each bar is produced different, is generally 5～7)
Anshan iron and steel plant ASP 1700 production lines, smart 6 rolling mills of pricking, by the analysis to the rolling data of reality, same specification (5.0*1250) pipe line steel and straight carbon steel are under same rolling condition, and there is certain deviation in the roll gap learning coefficient, data such as following table:
| Steel | ??LCS1 | ??LCS2 | ??LCS3 | ??LCS4 | ??LCS5 | ??LCS6 | Average |
| ??X46 | ??-0.4364 | ??0.1492 | ??0.3039 | ??0.3050 | ??0.3650 | ??0.5153 | |
| ??Q235B | ??-0.7369 | ??-0.1714 | ??0.0518 | ??0.1173 | ??0.1701 | ??0.1803 | |
| Deviate | ??0.3005 | ??0.3206 | ??0.2521 | ??0.1877 | ??0.1949 | ??0.335 | ??0.2651 |
Annotate: statistical method is got the following 200 blocks of steel of similar rolling condition respectively, asks its average learning coefficient to get the lcs that often rolls kind Q235B
iValue obtains pipe line steel X46 place other α value of layer as a reference value, this value is deposited in the other file of the layer record at pipe line steel X46 place, just can realize after finishing that these two layers do not replace when rolling the target of raising thickness control accuracy.
Claims (2)
1. the band aluminium mill roll-gap control method of eliminate influence of specification change, it is characterized in that, the roll gap offset that this method is determined by specification by increase in finish rolling roll gap computing formula is eliminated and is changed the rolling influence of specification, improve and to change the head thickness control accuracy of specification when rolling, the computation model formula of finish rolling roll gap is:
In the formula: the gap-finishing mill calculates roll gap
Fdh-finishing mill exit thickness
The f-finishing mill calculates roll-force
f
0-finishing mill acyclic homologically trioial roll-force
M-finishing mill mill stiffness
Lcs-roll gap learning coefficient, under the identical rolling condition, the specification difference, there is deviation in this value, and the specification span is big more, deviation
Be worth greatly more, influence the head thickness precision.
α-roll gap offset determines this value according to specification
I-represents the finishing mill shelf number, scope 1～n (n represents the finishing stand number, and each bar is produced different, is generally 5～7).
2. the band aluminium mill roll-gap control method of eliminate influence of specification change according to claim 1 is characterized in that, described roll gap offset α is relevant with steel grade, thickness, width; Definite method of α value is in actual production process, by actual rolling result data under a large amount of normal rolling conditions is carried out statistical analysis, selects the lcs of conventional variety
iThe mean value of value is as a reference value, with other lcs of other layer
iIt is poor that mean value and this a reference value are done, and obtains the lcs of each frame
iThe deviate of value, the mean value of getting this deviate is as other α value of each layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200910010677 CN101829687B (en) | 2009-03-13 | 2009-03-13 | Method for controlling roll gap of strip steel finishing mill to eliminate influence of specification change |
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| CN 200910010677 CN101829687B (en) | 2009-03-13 | 2009-03-13 | Method for controlling roll gap of strip steel finishing mill to eliminate influence of specification change |
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| CN101829687A true CN101829687A (en) | 2010-09-15 |
| CN101829687B CN101829687B (en) | 2013-04-03 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581036A (en) * | 2011-01-12 | 2012-07-18 | 宝山钢铁股份有限公司 | Hot tandem mill zero-position adjusting method with rolling force protection effect |
| CN102581037A (en) * | 2011-01-12 | 2012-07-18 | 宝山钢铁股份有限公司 | Method for adjusting zero position of two sides of hot continuous rolling mill |
| CN102896156A (en) * | 2012-09-29 | 2013-01-30 | 鞍钢股份有限公司 | Optimization method for hot rolled strip steel roll gap model |
| CN102974625A (en) * | 2012-12-18 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Rolling pressure compensation method of finish rolling rack |
| CN103191931A (en) * | 2012-01-10 | 2013-07-10 | 宝山钢铁股份有限公司 | Method for controlling two side deviations after zero adjustment of hot continuous rolling mill |
| CN103506404A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Method for controlling roll gap during finish rolling of strip steel |
| CN107363104A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | A kind of hot-continuous-rolling strip steel finish rolling roll gap adjustment process roll gap learning coefficient modification method |
| CN107755431A (en) * | 2017-09-14 | 2018-03-06 | 首钢京唐钢铁联合有限责任公司 | A kind of milling method of hot-rolling high-strength steel |
| CN112872046A (en) * | 2020-11-26 | 2021-06-01 | 冶金自动化研究设计院 | Method for improving setting precision of hot rolling roll changing specification rolling thickness |
| CN114472541A (en) * | 2022-02-16 | 2022-05-13 | 南京钢铁股份有限公司 | Control method for thickness precision of steel plate |
| CN114733913A (en) * | 2022-03-22 | 2022-07-12 | 安阳钢铁股份有限公司 | Roll gap compensation system of hot continuous rolling finishing mill group based on statistical analysis |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1253863A (en) * | 1999-11-30 | 2000-05-24 | 上海宝钢集团公司 | Zero correction method for tandem mill with band steel down-pressing position |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1020868C (en) * | 1988-02-23 | 1993-05-26 | 冶金工业部钢铁研究总院 | Thickness gauge type thickness setting and measuring method for agc system |
| DE4141230A1 (en) * | 1991-12-13 | 1993-06-24 | Siemens Ag | ROLLING PLAN CALCULATION METHOD |
| CN1027426C (en) * | 1991-12-21 | 1995-01-18 | 冶金工业部钢铁研究总院 | Method to set up gap values between rollers for rolling medium plates |
| CN1216699C (en) * | 2002-09-19 | 2005-08-31 | 鞍钢集团新钢铁有限责任公司 | Mthod for controlling roller gap of precision rolling machine of band steel |
-
2009
- 2009-03-13 CN CN 200910010677 patent/CN101829687B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1253863A (en) * | 1999-11-30 | 2000-05-24 | 上海宝钢集团公司 | Zero correction method for tandem mill with band steel down-pressing position |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581036A (en) * | 2011-01-12 | 2012-07-18 | 宝山钢铁股份有限公司 | Hot tandem mill zero-position adjusting method with rolling force protection effect |
| CN102581037A (en) * | 2011-01-12 | 2012-07-18 | 宝山钢铁股份有限公司 | Method for adjusting zero position of two sides of hot continuous rolling mill |
| CN102581037B (en) * | 2011-01-12 | 2013-12-25 | 宝山钢铁股份有限公司 | Method for adjusting zero position of two sides of hot continuous rolling mill |
| CN102581036B (en) * | 2011-01-12 | 2013-12-25 | 宝山钢铁股份有限公司 | Hot tandem mill zero-position adjusting method with rolling force protection effect |
| CN103191931B (en) * | 2012-01-10 | 2015-03-04 | 宝山钢铁股份有限公司 | Method for controlling two side deviations after zero adjustment of hot continuous rolling mill |
| CN103191931A (en) * | 2012-01-10 | 2013-07-10 | 宝山钢铁股份有限公司 | Method for controlling two side deviations after zero adjustment of hot continuous rolling mill |
| CN103506404A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Method for controlling roll gap during finish rolling of strip steel |
| CN102896156A (en) * | 2012-09-29 | 2013-01-30 | 鞍钢股份有限公司 | Optimization method for hot rolled strip steel roll gap model |
| CN102974625B (en) * | 2012-12-18 | 2014-12-10 | 山西太钢不锈钢股份有限公司 | Rolling pressure compensation method of finish rolling rack |
| CN102974625A (en) * | 2012-12-18 | 2013-03-20 | 山西太钢不锈钢股份有限公司 | Rolling pressure compensation method of finish rolling rack |
| CN107363104A (en) * | 2016-05-12 | 2017-11-21 | 鞍钢股份有限公司 | A kind of hot-continuous-rolling strip steel finish rolling roll gap adjustment process roll gap learning coefficient modification method |
| CN107363104B (en) * | 2016-05-12 | 2019-01-08 | 鞍钢股份有限公司 | A kind of hot-continuous-rolling strip steel finish rolling roll gap adjustment process roll gap learning coefficient modification method |
| CN107755431A (en) * | 2017-09-14 | 2018-03-06 | 首钢京唐钢铁联合有限责任公司 | A kind of milling method of hot-rolling high-strength steel |
| CN112872046A (en) * | 2020-11-26 | 2021-06-01 | 冶金自动化研究设计院 | Method for improving setting precision of hot rolling roll changing specification rolling thickness |
| CN114472541A (en) * | 2022-02-16 | 2022-05-13 | 南京钢铁股份有限公司 | Control method for thickness precision of steel plate |
| CN114472541B (en) * | 2022-02-16 | 2024-01-09 | 南京钢铁股份有限公司 | Control method for thickness precision of steel plate |
| CN114733913A (en) * | 2022-03-22 | 2022-07-12 | 安阳钢铁股份有限公司 | Roll gap compensation system of hot continuous rolling finishing mill group based on statistical analysis |
| CN114733913B (en) * | 2022-03-22 | 2024-03-26 | 安阳钢铁股份有限公司 | Roll gap compensation system of hot continuous rolling finishing mill group based on statistical analysis |
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